Light Settings

Sunlight

LumenRT contains a wide range of lighting options in order to properly illuminate scenes and models. Lighting options include:

Sunlight and Moonlight
Point Lights
Spot Lights
IES Lights
Luminous Materials

Lights are added and set in the source CAD/CG/GIS system and then displayed inside LumenRT. The LumenRT LiveCube contains control for adjusting the light intensity and other characteristics such as bloom and flaring. All other light properties such as power, color, position, spread, and softness are set in the CAD/CG/GIS system.

The Sun is controlled by the time of the day position on the Lights tab along with any north angle adjustment.

Point Lights emit light in all directions from the center of the light. Spot lights emit light in a directed cone pattern. Point and Spot lights accept the following inputs in order to adjust their appearance:

Power - sets the amount of light emitted from the light in lumens. A typical household light emits around 1500 lumens while street lights can emit 50,000 lumens or more.
Color - sets the color of the light.
Spread - for spot lights, this sets the cone spread angle of the light ranging from 0 degrees to 90 degrees.
Profile - enables IES data to be used in calculation of the light intensity.
Falloff - for spot lights, this sets the softness of the light at the edges ranging from 0% to 100%.

IES lights (Illumination Engineering Society) Lights are lights that are generated by an IES profile. IES profiles are available from virtually all light manufacturers and are created as .IES files. These files can be attached to any LumenRT point or spot light in order to generate the IES illumination pattern.

Sample IES profiles are provided with LumenRT and can be found in your ProgramData/e-onsoftware/LumenRTxxxx/IES_profiles folder.

Luminous Materials

LumenRT accepts materials with a luminous property that gives the appearance of light. The light does not cast illumination or generate shadows but does add a glowing effect to the material. Luminous materials are useful for things like building windows and car headlights.

This panel is used to set up artificial lights in the scene or to change properties of previously added lights.

Add - Click to open the Lights browser to select the type of artificial light you wish to add to the scene.
Light On/Off Switch - Toggles the light on or off. The main light switch in the upper right corner switches all lights on or off.
Light Slider - Adjusts the intensity of the light.

Note: If you mouse over and click an individual light label, it will bring up the detailed light control dialog. Also clicking on the light in the scene will display this dialog as well. The fields will vary with the type of light selected.

Type - Displays the type of light.
Power - Use the slider to increase or decrease the power of the light.
Color - Click the colored light square to display the Color selector or use the dropbox to select the color of the light.
Profile - Click the Profile arrow to display the list of IES profiles available.
Visible Light Source - Once a light placed into a scene you can switch off/on the source of the light.
Cast Shadows - It allows to disable the reflection of the object, which causes with light source.

If you have added a light(s) to the scene, the name(s) of the light with Power slider will display on the dialog.